/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright (c) 2015, Joyent, Inc.
*/
/*
* Test getentropy(3C)
*/
#include <unistd.h>
#include <sys/mman.h>
#include <assert.h>
#include <errno.h>
int
main(void)
{
int ret;
void *addr;
uint8_t errbuf[512];
uint8_t buf[128];
ret = getentropy(buf, sizeof (buf));
assert(ret == 0);
/* Max buffer is 256 bytes, verify if we go larger, we error */
ret = getentropy(errbuf, sizeof (errbuf));
assert(ret == -1);
assert(errno == EIO);
ret = getentropy(errbuf, 257);
assert(ret == -1);
assert(errno == EIO);
ret = getentropy(errbuf, 256);
assert(ret == 0);
ret = getentropy(errbuf, 0);
assert(ret == 0);
/* Bad buffers */
ret = getentropy(NULL, sizeof (buf));
assert(ret == -1);
assert(errno == EFAULT);
/* Jump through a hoop to know we'll always have a bad address */
addr = mmap(NULL, 4096, PROT_READ, MAP_PRIVATE | MAP_ANON, -1, 0);
assert(addr != MAP_FAILED);
ret = munmap(addr, 4096);
assert(ret == 0);
ret = getentropy(addr, sizeof (buf));
assert(ret == -1);
assert(errno == EFAULT);
return (0);
}